Width/Height to bolt thumbs

gistfile1.php

<?php

public function parseResizedImages($text) {
    $doc = new DOMDocument();
    @$doc->loadHTML($text);
    $tags = $doc->getElementsByTagName('img');
    foreach ($tags as $tag) {
        if (substr($tag->getAttribute("src"),0,7) == "/files/") {
            if ($wid = $tag->getAttribute("width")) {
                $pathParts = pathinfo($tag->getAttribute("src"));
                $tag->setAttribute("src", "/thumbs/".$wid."x0/".$path_parts['dirname'].'/'.$pathParts["filename"].'.'.$pathParts["extension"]);
                $tag->removeAttribute("width");
                $tag->removeAttribute("height");
                $text = preg_replace('~<(?:!DOCTYPE|/?(?:html|body))[^>]*>\s*~i', '', $doc->saveHTML());;
            }
        }
    }
    return $text;
}